// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
(function(){
  var cache = {};

  this.tmpl = function tmpl(str, data){
    // Figure out if we're getting a template, or if we need to
    // load the template - and be sure to cache the result.
    var fn = !/\W/.test(str) ?
      cache[str] = cache[str] ||
        tmpl(document.getElementById(str).innerHTML) :

      // Generate a reusable function that will serve as a template
      // generator (and which will be cached).
      new Function("obj",
        "var p=[],print=function(){p.push.apply(p,arguments);};" +

        // Introduce the data as local variables using with(){}
        "with(obj){p.push('" +

        // Convert the template into pure JavaScript
        str
          .replace(/[\r\t\n]/g, " ")
          .split("<%").join("\t")
          .replace(/((^|%>)[^\t]*)'/g, "$1\r")
          .replace(/\t=(.*?)%>/g, "',$1,'")
          .split("\t").join("');")
          .split("%>").join("p.push('")
          .split("\r").join("\\'")
      + "');}return p.join('');");

    // Provide some basic currying to the user
    return data ? fn( data ) : fn;
  };
})();

var str_smugplug = function(apiKey, serviceUrl) {

    var
            apiKey = apiKey,
            serviceUrl = serviceUrl,
            sessionId = null,
            imagesCache = {},
            ensureSession = function(callback) {
                if (sessionId != null) {
                    callback(sessionId);
                } else {
                    $.getJSON(
                            serviceUrl,
                            {"method": 'smugmug.login.anonymously', "APIKey": apiKey},
                            function(data) {
                                callback(sessionId = data.Login.Session.id);
                            }
                    );
                }
            };

    this.str_smug_latest_albums_thumbs = function(nickName, callback) {
        ensureSession(function(sessionId){
            $.getJSON(
                    serviceUrl,
                    {
                        "method": 'smugmug.albums.get',
                        "NickName": nickName,
                        "APIKey": apiKey, sessionId: sessionId,
                        "Empty": false
                    },
                    callback
            );});

    };

    this.str_smug_image = function(albumId, albumKey, imageId, callback) {

        var findImageFromResponse = function(data, needle) {

            var result = null;
            $(data.Album.Images).each(function(i, e) {
                if (e.id == needle) {
                    result = e;
                    return false;
                }
            });
            return result;
        };

        if (imagesCache[albumId]) {
            callback(findImageFromResponse(imagesCache[albumId], imageId));
            return;
        }

        ensureSession(function(sessionId) {
            $.getJSON(
                    serviceUrl,
                    {
                        "method": 'smugmug.images.get',
                        "sessionId": sessionId,
                        "APIKey": apiKey,
                        "Heavy": true,
                        "AlbumID": albumId,
                        "AlbumKey": albumKey
                    },
                    function(data) {
                        imagesCache[albumId] = data;
                        callback(findImageFromResponse(data, imageId));
                    }
            );
        });
    };
};